When traveling in any season other than summer you will need some sort of outerwear. Choose your items carefully because this will be the first if not the only piece that will be noticed.
Especially in the winter, your outfit is basically your coat, so it had better look nice. Coats and trenches are great because they can cover a multitude of sins while making you look sleek and sophisticated, I love that.
Travel in the winter requires a nice warm coat. The coat does not have to fall under the travel light guidelines because you will be wearing it instead of carrying it in your luggage. Dark colors work best in a classic, fitted style. Choose one that gives you a flattering silhouette and fits comfortably over your other layers. Parkas and other loose fitting sport type jackets should be avoided.  A coat that is fitted in at the waist will give a tailored and elegant look. Trendy styles (such as a puffer jacket) are acceptable as long they fit well. Avoid overly long and loose, boxy styles.
A trench coat is ideal for fall and spring weather travel. It can also really elevate your chic factor.
What’s more classic than a trench? When selecting a trench look for a classic cut and a proper fit, nothing super loose. Neutrals work best. Some styles are even treated to be water repellent.
I’m addicted to blazers so of course I find them useful for spring and even early fall travel. Look for a lightweight style in a dark or neutral color that works well over your other layers. Find one that is fitted and that accentuates your waist. The blazer should be able to button up comfortably. I love their ability to camouflage problem areas and dress you up at the same time.